@liaizon ooh, that was a misunderstanding: I thought what you said was about Inventaire itself stopping, sorry! 😂
About AP in Inventaire, the current implementation is limited to broadcasting activity to the world. From that issue https://codeberg.org/inventaire/inventaire/issues/638 it seems that "the world" is actually a bit limited, we will need to look into that.
We have ideas of AP-powered cross-instance book exchanges, but that's not for this year I'm afraid. And that wouldn't be enough to fully call Inventaire federated, until we figure-out how to do federated inventories.